Preheated Thermoviscous Composite Resin: A Useful Option for Restoring Noncarious Cervical Lesions

A new study published in the Journal of Dentistry suggests that preheated thermoviscous composite resin is a useful option for restoring noncarious cervical lesions.

Study Overview

This 24-month, double-blind, split-mouth randomized clinical trial aimed to compare the retention rates of a preheated thermoviscous composite resin (PHT) compared to a non-heated composite resin (NHT) in non-carious cervical lesions (NCCLs).

• A total of 120 restorations were restored on NCCLs using a preheated (VisCalor bulk, Voco GmbH) and a non-heated (Admira Fusion, Voco GmbH) composite resins with 60 restorations per group.
• A universal adhesive in the selective enamel conditioning was applied.
• In the PHT group, the composite was heated at 68 °C using a bench heater.
• In the NHT group, no heating was employed.
• Both restorative materials were dispensed into caps and inserted into the NCCLs.

The restorations were evaluated at baseline, 6, 12, 18, and after 24 months of clinical service using the FDI criteria. Statistical analysis was performed with Kaplan–Meier estimation analysis for retention/fracture rate and Chi-square test for the other FDI parameters (α=0.05).

Results

After 24 months, 108 restorations were assessed. Seven restorations were lost (two for PHT group and five for NHT group), and the retention rates (95% confidence interval [CI]) were:

• 96.7% (81.5–99.9) for PHT group
• 90.8% (81.1–96.0) for NHT group

There were no statistical differences between them (p > 0.05). The hazard ratio (95% CI) was 0.52 (0.27 to 1.01), with no significant difference within groups. In terms of all other FDI parameters that were assessed, all restorations were deemed clinically acceptable. Both composites showed high rates of retention after 24 months. The clinical performance of the new preheated thermoviscous was found to be as good as the non-heated composite after 24 months of clinical evaluation in non-carious cervical lesions.

Reference

Michael Willian Favoreto, Taynara de Souza Carneiro, Romina Ñaupari-Villasante, Deisy Cristina Cordeiro, Gabriel David Cochinski, Thais Vilalba Paniagua Machado do Nascimento, Thalita de Paris Matos, Matheus Coelho Bandeca, Alessandra Reis, Alessandro D. Loguercio. Clinical performance of preheating thermoviscous composite resin for non-carious cervical lesions restoration: A 24-month randomized clinical trial. Journal of Dentistry, Volume 144, 2024, 104930, ISSN 0300-5712, https://doi.org/10.1016/j.jdent.2024.104930.

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